Faraday Cage EMP ESD Bags Complete 20pc Kit Survivalists Preppers Complete Nesting Kit Accomodates Laptops, Tablets, Smart Phones & Hard Drives High Grade Multiple Layer Anti Static Shielded ESD Faraday Cage Design Heavy Duty Secure Ziplock 5-layer Aluminized protection guards against charges inside and out. 20pc kit: Qty 4 (15" X18") Qty 8 (8" X 11") Qty 8 (5"x7") - Interior Dimensions